Electric fan



Nov 4, 1930. J. LANZ 1,780,789

Filed July 29, 1926 2 Sheets-Sheet l Nov. 4, 1930. J. LAYNZ 1,780,789

ELECTRIC FAN Filed July 29, 1,926 2 Sheets-Sheet 2 Patented Nov. 4, 1930were STATES PATENT, QFF CEY;

JOHN LANZ, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

THE A. C. GILBERT COMPANY, OF HAVEN, CONNECTICUT, A CORPORATION OFMARYLAND ELECTRIC FAN Application filed. July 29, 1926. Serial No.125,702.

This invention relates to electric fans, and more particularly to a fanof the oscillating type so constructed that when the fan is set inmotion, the motor and fan oscillate about a vertical axis, so that theair blown by the fan will be directed in a wide sweep or are instead ofin a single direction. In the past, when such fans have beenconstructed, the oscillating means is driven directly and positivelyfrom the motor shaft so that Whenever the motor shaft is in operation,the fan must oscillate, and vice versa. It very often occurs inconnection with the use of such devices, that the fan guard or some partof the motor body will, during its oscillation, come in contact withsome object whereby its movement will be stopped. This will in turn stopthe motor, due to the direct driving con-' nection between the motorshaft-and the os cillating means, and as the current continues, themotor will be burned out. I contemplate the provision of a fan whereinthe oscillating mechanism .and its connection to the motor shaft will besuch that, while during normal operation of the motor, the fan willoscillate in the usual way, at the same time, if the oscillatingmovement is checked or stopped, the operation of the motor and fan willcontinue aslong as current is supplied, and, therefore, the likelihoodof any damage being done to the motor is obviated.

One object of my invention, therefore, is to provide an oscillating fanof such construction that the motor and fan may operate although theoscillation of the fan is prevented. 7

Another object of my invention is to provide a frictional or slippingconnection between the shaft of the fan motor and the oscillatingmechanism, such that if the operation of the latter is prevented, theformer Will not be affected.

A still further object of my invention is V driving disk will operateindependently thereof. v l 1- i A still further object of my inventionis to provide new and improved driving connections between the fan motorand the os-- cillating mechanism whereby an oscillating fan may becheaply and economically made' The invention furtherv relates-toimprove- J -ments in various features of the motor itself,

as will be more specifically pointed outhere inafter.

To these and other ends, the invention resides in the novel features andcombinations of parts to be hereinafter. described and claimed. I

'In the accompanying drawings: Fig. l is a front elevational view of anoscillating fan, embodying my improvements;

Fig. 2 is a side view of the same Fig. 3 is a rear elevational view ofthe motor body and the oscillating mechanism;

Fig. 4: is asectionalview, on line 4.-'4 of Fig. 3; i v

Fig. 5 is a sectional view'on line 55 of Fig. 4;

Fig. 6 is a sectional View through the gear casing, taken on line 66 ofFig. 7

Fig. 7 is a top plan view of the gear casing, the cover thereof havingbeen removed to reveal the interior mechanism; i

Fi 8 is a sectionalview on line 88 of Fig.

Fig. 9is a sectional view on line 99 of Fig; 4; i i I Fig. 10 is anunderneath plan view 'ofth'e driven disk of the oscillating mechanism.

Fig. .11 is a sectional view on line 11l1 of end of the pivot screw isthreaded a wing nut 15, by which the ears 11 and 12 may be clampedagainst the'flat sides of the lower end 16 of the standard to secure.the fan in adjusted tilted positions relatively tothe base.

The motor casing preferablyv consists of front and back end members 18and 19, and an intermediate section 20, all of which parts 10, Vheld,.togetherbybolts 21, shown more espee are preferably stampedfromsheet metal and cially on Figs. 2 and 3, which pass through thesethree parts and also through the field core 22, so as to hold. thepartsof the motor. casing and the field 'corein assembled relation.'Thefield winding is shown at 23 and maybe of anyprefer red type. a

The end sections l8 and 19 of the motor casing, are provided-withperforations at their central portions for the passage therethrough ofthe motor shaft, and about these perforations extend outwardly, as shownat $25 and 26, to provide housings for bearing members 27 and28; Thesebearing members are held in place by inner bearing caps 29 and V I 30,secured by the screws or rivets 31 and 32,

at the interior of the casing.

Asshown more especially in Fig' .6, the

' bearing members 27 and 28 comprise'substantially spherical membersflattened at th e1r-p oles, andprovided with central-perforations 33 forthe passage of the ,motor 5 :=Shaft projects at both, ends 1nish thelubricant between the bearing memcasing. Upon its front end I .j funblades42 in the usual manner. Also secured adj acent the front, end ofthe shaft but W1th 1n the motor casing is the'commutator 4:3,;1n contactwithwhich are the v usual brushes housed in chambers covered'by the caps44- andti shownin F ig; 1. A1 sleeve 46 surrounds the rear end of theshaft' and La-buts a bearing member 28 -to prevent 'excess longitudinalplay of the shaft ,withinthe' housing;

The middle section20 of themotor is "provided at its lower end withdepending ears 4:7 and a8, by which the motor casing is secured-to abearing block 4L9, by means-of ,a bolt 50,;pa'ss'ing through an openingin the and registering openings in the ears .47 Th belifi als vp h u h aie ifereti nzie la -rev end f a p e 1 m- [cured a driving disk- 73provided with aucenw are secured the driving disk 73?. is positioned'afibre washer81, through which I ythe body lof-the screw 76 passes.:lttvill be 112 seen that thespring T 9 tends to hold the driven disk 78in tight C(DHhZLCtLWit-h the fibre washer, and likewise, the latter intight con-V t ith hedr ns disk- 8s n misma ceived within acentralopening 52 in the bearing block, soas to secure this pin to theblock and motor casing. The body of the pin, which projects from theblock 4=9, is received in the bore 53 of the standard 13, and is securedfor rotating or oscillating movement therein by means of a screw 5dpassing 1 through the standard and entering an annular channel 55 in thepin. It will be appar ent, therefore, that with this censuses-( 1 themotor: casing "and standard -13-may be tilted aboutthe pivot 14:,and-in-ad'diti-on the 7 motor casing may be rotated relatively to the pstandard 13, about a vertical axis.

f At the rear endof the motor casing is secured a gear housing by thesamescrews This gear casing is provided adjacent itslowper side with abearing bossfil, and is left open at its upper side to be covered by aremov v able cap 62.

The rear end ofthe motor shaft extends; into this gear housing andisprovided with worm .threads 63 thereon, which engage .a

worm wheel 64:, secured to a sleeveshaft 65 rotatably mounted upon astud 66, secured in'the lugs 67 and 68, formed 'integrallywith '32 whichhold the bearing cap BO ,in place.

the gear housingt As shown inIig.8 ,-the

stud 66 is inserted from the exterior of the housing, through abore inthe lug :68, 1and* held in placeby the screw 69, .the'nemote end of theshaft being vseat-ed in {recess in the lug 67 V The sleeve. 65 isprovided acent 67 with worm ,teeth' 7O, which engage the? teeth ofthe-worm wheel/T1, secured to.,.the

vertical shaft 72, whichis rotatably mounted in the bearing'boss .61.The stud 66 is provided with a shoulder '13, which contacts with to urgethe sleeve shaft '65 against the h1g5? so as'tomainta'in the wormfZOproper re:la Ition withthe worn-1 wheelf7l. Upon the lowerend-tof theshaft 72 is 1 etral perforation .74, threaded to, receive the the sideface .of'the worm wheelfit, and tends a threaded end of the shaft 72,and also the i threaded end 7 5 of azscrew :76.""The.body of this. screwis. considerably larger than the threaded end 75, andfabuts against thelower 1,

surface of the driving disk 73 Thisiscrew is received in a counter boredrecess 77, a driven crank disk 78. A. coil sp $119 mounted in thecounter, bore of t'hi. reacts between the head of the screwiand recess"the lower shoulder'80 of the counterboreto urge the driven disk orcr'anlg' 78 toward Between thesetw'o disks m ,tri tienal; dri ingeenneption is. provided between these two disks which under ordinaryoperating conditions is sufficientlyindependently of the driven disk.

On the standard 13 is provided a projecting lug 84, to which is pivoteda link 85, pivoted in turn at its other end to the driven disk 78 bymeans of the screw 86, the pivot point being eccentric to the axis ofrotation of this disk. It will be apparent that when the driven disk 78rotates, the fan and the motor casing will be caused to oscillate withrespect to the standard 13 and the base 10, due to the action of thelink 85. However, if the fan guard or some portion of the motor bodycontacts with some object, so as to prevent the oscillating movement,the driven disk 78 will remain at rest without interfering with therotation of the motor shaft and fan.

The fan blades may be protected by a wire guard 87 of any usual orpreferred form.

While I have shown and described'herein a novel form of bearing andcertain improvements relative to the means for mounting the parts of themotor within and by a sheet metal casing and on a base orothersupporting member, I do not claim the same herein since theseimprovements have been made the subject matter of my co-pendingapplications for an electric fan, Serial No. 248,655, filed January 23,1928, and an electric motor, Serial No. 349,046, filed March 22, 1929.

While I have shown and described a preferred embodiment of my invention,it is to be understood that it is not to be limited to all the detailsshown, but is capable of modification and variation within the spirit ofthe invention and within the scope of the appended claims.

W'hat I claim is 1. In an electric fan, an electric motor, a base uponwhich said motor is mounted to oscillate, and means to oscillate themotor comprising a shaft rotated from the motor shaft, a disk mounted onsaid shaft, a screw having an enlarged head secured to the under side ofsaid disk, a second'disk provided with 1 a counter-bored recess toreceive said screw,

2. In an electric fan, an electric motor com prising a casing, a gearhousing secured at one end thereof and carrying a depending bearingboss, a shaft rotatably mounted in I said boss and driven from themotor-shaft, a driving disk carried by the lower end of said shaft, anda crank disk supported by the shaft and held in frictional drivingrelation with said driving disk. r

3. In an electric fan, a. stationary base, an electric motor mounted foroscillatory movement on said base, a vertical rotatable shaft drivenfrom the motor shaft, a driving disk carried on the lower end of therotatable shaft, a disk supported by the rotatable shaft and havingfrictional driving relation withthe driving disk, a crank pin on thesecond named disk, and a link having one end received on the crank pinand the other end mounted on the stationary base.

4. In an electric fan, a stationary base, an electric motor mounted foroscillatory movement on said base, a vertical rotatable shaft drivenfrom the motor shaft, a driving disk carried on the lower end of therotatable shaft, a disk supported by the rotatable shaft and havingfrictional driving relation with the driving disk, a crank pin on thesecond" named disk, and .a link having one end received on the crank pinand the other end mounted on the stationary base, and means forresiliently urging the second named disk into frictional drivingrelation with the driving disk.

5. In an electric fan, a stationary base, an electric motor mounted foroscillatory movement on said base, a vertical rotatable shaft drivenfrom the motor shaft, a driving disk carried on the lower end of therotatable shaft, a disk supported by the rotatable shaft and havingfrictional driving relation with the driving disk, a crank pin on thesecond named disk, and a link having one end received on the crank pinand the other end mounted on the stationary base, and means forresiliently urging the second named disk In witness whereof, I havehereunto set my hand this 27th day of'July,

. 7 JOHN LANZ.

